Coil-forming apparatus.



J. A. BURNS.

COIL FORMING APPARATUS.

APPLICATION FILED D3031, 1908.

1,082,494. Patented Dec. 30, 1913.

'3 SHEETS-SHEET 1.

Fig.7.

I ENTOR 2 41% ATTORNEY' WITNESSES:

J. A. BURNS. COIL FORMING APPARATUS.

APPLIOATION FILED DEG. a1, 1906.

Patented Dec. 30, 1913.

3 SHBETSSHEET 2.

iingj i IN NTOR WM ATTORNEY J. A. BURNS.

COIL FORMING APPARATUS.

APPLICATION FILED DEO.31,-1908.

1,082,494. Patented Dec. 30, 1913.

3 SHEETS-SHEET 3.

WITNESSES: INVENTOR BY ,;ATT(')RNEY lUNl a s 'rrns PATENT OFFICE.

JAMES A. BURNS, OF PITTSBURGH, PENNSYLVANIA, ASSIGNO RI TO WESTINGHOUSEELECTRIC & MANUFACTURING- COMPANY, A CQEPORATION OF PENNSYLVANIA.

COIL-FORMING APPARATUS.

nosaaaa.

Specification of Letters Patent.

Patented Dec. 38, 1.913.

To all whom it may concern Be it known that I, JAMES A. BURNS, a citizenof the United States, and a resident of Pittsburgh, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Coil-Forming Apparatus, of which the following is aspecification.

My invention relates to molds or forms used in the manufacture of coilsfor electrical machines, and it has for its object to provide a mold orform with a movable side iember which may be readily adjusted toany'desired degree for the purpose of adapting the mold to any size ofcoil or wire.

It has heretofore been a more or less common practice to employ moldshaving movable side members for the purpose of adapting them to wire orcoils of difi'erent dimensions, but, in such cases, the means employedfor adjustin the movable members have been of such ciaracter that exactadjustment to absolutely fixed positions and with very fine graduationsof movement have not been possible, whereas, by the use of my inventiona considerable range of movement of the adjustable member is possible,and it is also feasible to adjust the member the smallest degree thatcan, under any circumstances, be desired, and, when so adjusted,whatever may be the degree of ad justment, the member is automaticallylocked against movement.

In the accompanying drawings, Figure 1 is a side elevation of a moldembodying my invention, Fig. 2 is a view similar to Fig. 1 but showinthe mold at a difierent angle and with the adjustable member removed,and Fig. 3 is a perspective view of the frame upon which the adjustablemember and the adjusting mechanism are mounted.

The mold 1 may be of such form and dimensions as may be required toenable the user to wind thereon a coil which shall have the desired sizeand shape, but, whatever may be such form and dimensions, the portionsof the space in which the sides of the coil are formed will be ofadjustable width, the shoulder at one side of one of said portions beingshown at 2.

Adjacent to the shoulder 2, the mold is provided with a recess in whichis seated a metal frame 3 of trough or channel shape in cross sectionhaving laterally projecting flanges 4 and 5, at its outer edges, andbeing provided, adjacent to its ends, with bolts 0r studs 6 whichproject outwardly beyond the flanges. Seated in the channel 7 of theframe 3 are two nuts 8 and 9 provided with screw threads of oppositepitch which engage a screw threaded shaft 10 the opposite ends of whichhave screw threads of opposite pitch to accommodate them to the nuts andthe middle portion of which is provided with a worm wheel 11.

Mounted in bearings adjacent to the middle portion of the shaft 10 is anoperating shaft 12 having a worm 13 in position to engage the worm wheel11 and provided, at its outer end, with a knob 1 1 by means of which theshaft may be operated.

Located in a recess in the flange 4 of the frame 3 and fastened thereinby screws 16, is a plate 15 having a bearing for the shaft 12, andmovably mounted on the flanges 4L and 5 is a block 17 having twolaterally extending slots 18 through which the studs or bolts 6 project,washers 19 and nuts 20 being mounted on the outer ends of said studs orbolts in order to hold the block in position. The block 17 is alsoprovided with two oppositely inclined slots 21 and 22 to receive studs23 and 2 1 with which the nuts 8 and 9 are provided. The block 17 isalso provided with a transverse slot 25 for the shaft 12, in order thatthe block may move latorally.

It will be readily seen that when the shaft 12 is turned in onedirection the screw shaft 10 will be rotated, through the action of theworm 13 and the worm wheel 11, and will thus draw the nuts 8 and 9toward each other, thereby causing the studs 23 and 24 to operate in theinclined slots and force the block away from the shoulder 2 of the mold.If the shaft is rotated in the opposite direction, the nuts will beforced away from each other and the action of the studs in the inclinedslots will be such as to move the block toward the shoulder 2.

It will be readily understood that any rotative movement of the shaft 12will effect a very much smaller degree of movement of the block byreason of the worm and screw gearing and that, however large or smallthe degree of movement, the block will be rigidly locked and thusprevented from yielding or moving in any degree unless and until theshaft 12 is moved by means of the knob 14.

Changes in structural details which do not produce material changes inmode, of. operation. or result are to) be understood? as within thescope of my invention.

I claim as my invention:

1. In a coil-forming mold having a shoulder, the combination of a blocklocated adjacent to the said shoulder and provided double screw shaftprovided with a worm wheel, nuts mountedi 011 said screw shaft andhaving studs that project intosaid inclined: slots and an operatingshaft having a worm that meshes with said worm/ wh'eel 2. Inacoil-forming moldhaving a shoulder, the combination with av blocklocated adjacent to; saidshoulder and provided with a pair of reverselyinclined slots, of a doublesorew shaft having a worm wheel nuts for saidscrew shaft having studs that project into said slots, a worm for.operating said worm: wheel, and means for holding said block to its,seat;

3. Ina eoila-for-minglmold having a shoulder, the combination with ablock having a its seat.

4:. In a coil formi'ng moldhaving a shoulider, the combination with alaterally movable block adjacent to said shoulder, of worm and screw.mechanism for moving saidblock toward and away from said shoulder.

with a pair of reversely inclined slots, a-

'd'er, the combination with a laterally mov- 5'. In a coil-forming moldhaving a shouladjust it toward and away from said. shoul- Ciel.

In testimony whereof, I have hereunto subi scribed my name this'22nd dayof December, i 1908.

pair of reversely inclinedv bearing surfaces, of a; double screw shafthaving a worm wheel,. a pair of nutsxforsaidi screw shaft havingprojeotlonsto engage said inclined T J AME'S" A. BURNS. lVitnesses:

IRENE WoLFENDALn, BIRNEY Hmns.

Copies-of this patent maybe obtained for five cents; each, byaddressingthe Commissioner of Patents;v Washington; D. 0:"

